Verdol paper



J. SPAH N VERDOL PAPER July 9, 1935.

Filed Sept. 18, 1933 Fig.1,

INVENTORI n1 lg KwMidj -GM ATTORNEYS Patented July 9, 1935 l UNITED STATES PATENT OFFICE VERDOL PAPER Johann Spahn, Tagerwilen, Switzerland Application September 18, 1933, Serial No. 690,029 In Germany September 28, 1932 4 Claims. (01. 139-333) This invention relates to a new Verdol paper. Aluminum foil is particularly suitable for coat- It is known that, for operating Verdol jacing the Verdol paper, since it is both inexpensive quards and other looms which work on a similar and resistant to corrosion. principle, perforated paper bands are used. The The coating of metal foil may be attached to patterns and designs which are woven are deterh V r l p p r y m ns of a suitable adhesive. mined by the number and arrangement of the The invention is not limited to Verdol papers perforations in these bands. These paper bands p p y Called s but is also app e o other are usually termed Verdol papers or hands. perforated p p s w ch are Verdol papers have the disadvantage that they purpose, i. e. in machines in which needles coexpand under the effect of moisture and contract act w the perforations n e p p 10 in dry air. These alterations in the surface area In th a p n ng raw n Fi ure 1 is a are particularly troublesome insofar as they face View of a small section of a V do p pe affect the width of the band. The Verdol papers embodying the presen invent 2 s a are guided like a cinematograph film by means transverse section thereof, and Figs. 3 and 4 are of pegs or pins which are fixed on a roller, and, similar sections of modified embodiments.

if the band expands, it does not lie evenly but Th r w n h w a V d p r 0 which becomes undulated, which leads to trouble, since may e n er d a v l n in th dir ction the needles which actuate the hooks either do not of the arrow- This paper a h usual edge enter the holes in the Verdol paper or remain p fo at o II fo the guidance of the p p caught in the holes and injure the band. In both through the text le machine and it is formed cases defects in the fabric result. Further, if additionally with numerous p a ons 2 which th rforati ns d not come to li exactly over afford the control action on the needles or other the needles, they become worn more quickly than s uments of the textile machine. usual; the whole band can then become displaced The e dol paper is shown as comp is a and trouble and defects in the fabric inevitably body portion l3 of pap whi s h n y 25 follow, sub ect to troublesome dlstortlon of dimension Many attempts have hitherto be n made t to a substantial extent by reason of natural variavoid these disadvantages. ations of moisture therein. United intimately The object of the present invention is to proup n ne side f h p er dy n i 1 and 2 vide an improved Verdol paper of which, under the is shown the Coating of relatively thin tal r 30 influence of the variation in the moisture in the aluminum foil H which c ot ly t air, the surface changes are substantially less strengthen h p p r u to fix the p per a ains tha heretofore or f which th urfa e rem i substantial alteration of dimensions. Aluminum practically unaltered in area, has the advantage of resisting corrosion and of 35. According to the invention, a stable Verdol pafacilitating smooth travel of h pap or band. per is made, for example from an ordinary Ver- It a ad strength, but fly, as d d, dol paper, by coating it on one or both sides with fixes the P p against distortiohmetal foil. Generally, a coating of foil on one Each band edge ay e a stifiening strip side is suflicient. preferably at the side opposite to the coating 14;

Especially when using a very thin and cheap and 1 y be s de ed n underneath paper, the Verdol paper according to the present View, although the band could be used either invention may practically consist of a metal foil Side D- coated on both sides with paper, that is to say In the embodiment of 3 the Verdol p p that the metal coated Verdol paper is provided "1 has not only the metal coating M on t paper with a pasted paper layer on the metalic side. body l3 but also a metal coating I l upon the 45 A Verdol paper which is coated with metal foil opposite face of the pap is substantially insensitive to moisture, that is In the modification of Fig. 4 the Verdol paper to say it does not expand in moist air and conband lo comprises not only the paper body 13 tract in dry air to any considerable extent, and and the metal or aluminum coating id but a its area remains substantially unchanged. Fursecond paper layer I3 overlying the metal coatther, it has the great advantage of being stronger ing, which latter is th so that it is not so liable to be torn as the ordinary two layers of paper, fix Verdol papers. Again, a. Verdol paper which is troublesome distortion. coated with metal foil slides better than ordinary Many m rs may be v r ly m dified with- Verdol paper. out departing from the principles of the invention. It is not intended to limit the invention to such matters except to the extent set forth in the appended claims.

What is claimed is:

mlg'KVerdol paper, in band or analogous form, for controlling textile machinery, and formed with usual perforations for guidance of the paper and for its control action, the same comprising a body of paper, inherently subject to troublesome substantial distortion of dimension by reason of natural variations of moisture therein, and the surface of such paper body having united to it a coating of relatively thin metal foil, acting both to strengthen the paper and to fix the paper against substantial alteration of dimensions.

2. A Verdol paper, in band or analogous form, and formed with usual perforations for controlling textile machinery, the same comprising a body of paper, inherently subject to troublesome substantial distortion of dimension by reason of natural variations in moisture therein, and the surface of such paper body having united to it a coating of relatively thin metal foil, and such metal foil being overlaid with a second paper layer united thereto, the metal foil, between the two layers of paper acting both to strengthen the paper and to fix the paper against subtsan tial distortion of dimensions.

3. A Verdol paper, in band or analogous form, and formed with usual perforations for guiding it and for controlling textile machinery, the same comprising a body of paper, inherently subject to troublesome substantial distortion of dimension by reason of natural variations in moisture therein, and the surface of such paper body having united to it a coating of relatively thin aluminum foil, acting both to strengthen the paper and to fix the paper against substantial distortion of dimensions.

4. A Verdol paper, in band or analogous form, and formed with usual perforations for controlling textile machinery, the same comprising a body of paper, inherently subject to troublesome substantial distortion of dimension by reason of natural variations in moisture therein, and both faces of such paper body having united to them coatings of relatively thin metal or aluminum foil, acting both to strengthen the paper and to fix the paper against substantial alteration of dimensions.

JOHANN SPAHN. 

